Cotter-pin tool



Sept. 8, 1925. 1,553,159

w. c. HENNINGSEN CUTTER PIN TOOL Filed Aug. 9 1924 2 Sheets-Shoot 1 \r/ILUAM C Hmmuesml.

arrow-ca w. c. HENNINGSEN COTTER PIN TOOL Filed Aug. 9. 1924 2 sham-sum 2 Patented seats 8 192%.

UN r stares WILLIAM G. HENNINGSEN, OE HUBBLETON, WISCONSIN.

, COTTER-PIN root.

Application filed August 9, 1924. Serial No. 731,111.

To all whom it may concern.

Be it known that WILLIAM C.-HENNING- SEN, a citizen of the United. States of America, residing at Hubbleton, in the countyof Jefferson and State of Wisconsin, has invented new and useful Improvements in Cotter-Pin Tools, of which the following is a specification.

The object of the invention is to provide a cheap and simple cotter pin tool combming in the one tool all the elements necessary to perform the operations of withdrawing and inserting cotter pins. a

With this object in view, the lnventlon consists in construction and combination of parts of which a preferred embodiment is illustrated in the accompanying drawings, wherein:

Figure 1 is a view in side elevation showing the tool in the operation of withdraw ing a cotter pin and showing in dotted lines the position assumed by the tool after the pin has been started in the removal operation.

Figure 2 is a detail view showing the ex tremit-ies of the tool jaws supporting or holding a pin transversely thereof.

Figure 3 is a similar view showing the jaws holding a pin positioned longitudinally thereof.

Figure 4 is a plan view of the hook jaw.

Figure 5 is a plan view of the fulcrum jaw.

Figure 6 is a transverse sectional view on the line 6-6 of Figure 4.

Figure 7 is a transverse sectional view on the line 77 of Figure 5.

Figure 8 is a plan view showing the two jaws in operative position with the cotter pin seated in the groove of the fulcrum jaw.

Preferably, the tool is made as a part of the conventional form of shifting fulcrum pliers, such as those indicated at 1, the handles 2 and 3 of which constitute the pivotally connected jaws'of the extractor.

'The jaw 2 on its extremity is formed with a terminal hook 4i dispose dat one side of the jaw and turned inwardly toward the handle 3, the hook being offset from a longitudinal groove 5 formed in the inner face of the jaw 2 and transversely roughened,

the groove being formed in a boss 6 protruding from the inner face of the 2.

The handle 3 has a jar 3 which is provided with a transverse groove 7 and a longitudinal groove 8, both of which are ser-' rated and the latter being complemental to the groove 5, so that a cotter pin may be held between the two and disposed with its length in direction with the length of the tool, as indicated in Figure 3, when such a position of holding the pin is the more convenient for the insertion of the latter. The throat 9 of the hook is complemental to the groove '7 and when the transverse position of the pin is the more convenient for insertion, it is placed in the groove and when the two jaws are brought together, it is held by said groove and the throat of the hook, as indicated. in Figure 2.

In the operation of removing a cotter pin, the hook 4 is first inserted in the eye of the cotter pin 10, as indicated in Figure 1 of the drawings, and the handles separated, the terminal of the handle 3 being placed against the bolt or stud 11 at a suitable point from the cotter pin to provide a fulcrum and transversely the terminal of the handle 3 is formed with a beveled edge 12, the terminal of which may seat in the threads of the bolt. Rocking the tool in one direction, with the extremity of the handle 3 as a fulcrum point, will serve to start the cotter pin, after which the two jaws are moved into engaging position, as indicated in dotted lines in Figure 1, when the terminal of the hook is shrouded by the extremity of the jaw 3, the latter being provided with a hole or eye 14 which the nose of the hook may penetrate. With the jaws retainedin engaging position, the cotter pin may be withdrawn and when released from the bolt or stud, is then securely held on the tool and may be removed on the separation of the jaw The invention having been described, what is claimed as new and useful is:

1. A tool forextracting cotter pins comprising pivotally connected handle members, the adjacent end portions of which having complemental jaws of which one has a transverse groove, the other of which having a curved hook with which a cotter pin to be held in the transverse groove cooperates, thereby causing a partial insertion of the cotter pin, the hook acting as a cotter pin extractor, the adjacent .faces of both jaws having complem'ental grooves at right angles to the first groove for the reception the transverse groove, the Wall at one end of one of the conipleniental grooves constituting a Wall of the transverse groove.

2. A cotter pin inserting and removing tool comprising a pair of pivotally connected handle members of Which one is terminally provided with a cotter pin extracting hook, the adjacent end portions of the tWo handle ineinb having coinpleinental jaws of which one has a transverse groove to receive a cotter pin and to cooperate With the extracting; hook to cause a partial insertion of a cotter pin, the adjacent "faces of both j aWs having conipleinental protrusions With 15 registering coinpleniental grooves at right angles to the first groove for the reception of a cotter pin to cause its insertion, Where it is necessary to insert such a pin at a point inaccessible by the use of the transverse groove, the end of the colnplemental protrusion of the jaws having the transverse groove constituting one Wall of the transverse groove which receives one leg of the cotter pin to hold it firm, While the end of the coinplen'iental protrusion of the other jaw constitutes an abutment for the cotter pin to prevent turning; of the cotter pin.

in testimony whereof he afiixes his signature WILLIAM G. HENNINGSEN. 

